稀土配位催化环硫氯丙烷与环氧丙烷开环共聚合研究  

Studies on the Copolymerization of Chloromethylthiirane with Propylene Oxide by Rare Earth Coordination Catalysts

作　　者：孙维林[1] 沈之荃[1] 张一烽[1] 

机构地区：[1]浙江大学高分子科学及工程学系,中国科学院化学研究所

出　　处：《高等学校化学学报》1996年第1期137-141,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：报道了稀土配位催化剂对环硫氯丙烷（ＣＭＴ）与环氧丙烷（ＰＯ）的共聚合．许多稀土化合物与三异丁基铝组成的催化体系都能使两者共聚；尤为突出的是Ｙ（Ｐ＿（２０４））＿３－Ａｌ（ｉ－Ｂｕ）＿３－Ｈ＿２Ｏ催化体系对此共聚反应具有优良的催化活性，最大催化效率达６０００ｇ／ｍｏｌＹ，分子量较大（［η］达１．０ｄＬ／ｇ），产率在５０％以上．应用ＩＲ、ＮＭＲ、ＧＰＣ等手段对共聚物进行了表征，测得ＣＭＴ（１）与ＰＯ（２）的共聚率分别为ｒ１＝０．０４１，ｒ２＝１．３７．The copolymerization of chloromethylthiirane (CMT)with propylene oxide (PO)was investigated by using rare earth coordination catalysts for the first time.It has been discovered that rare earth coordination catalysts,especially Y(P_(204))_3-Al(i-Bu)_3-H_2O system,are effective catalysts for preparing high molecular weight([η]about 1.0 dL/g)CMT-POcopolymer in a high yield(50%).The catalytic efficiency of Y(P_(204))_3-Al(i-Bu)_3-H_2O systemreached 6000 g/mol Y. The copolymer structure was also characterized by IR,NMR,GPC.The reactivity ratio CMT(1)and PO(2) were obtained as r_1=0.41 and r_2=1.37 respective-ly.

关 键 词：稀土 催化剂 环硫氯丙烷 环氧丙烷 开环共聚合 

分 类 号：TQ316.341[化学工程—高聚物工业]